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Browsing by Subject "Pavements"

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Analytical and laser scanning techniques to determine shape properties of aggregates used in pavements

Author: Komba, Julius J Date: Jun 2013 The work presented in this dissertation contributes to the current innovative research at the Council for Scientific and Industrial Research (CSIR) in South Africa, to automate the measurement of aggregate shape properties. The CSIR’s present ... Read more
Bitumen rubber asphalt mix testing for South African pavement design method

Author: Anochie-Boateng, Joseph ; Denneman, E ; Verhaeghe, Benoit MJA Date: Jul 2011 The South Africa National Road Agency Ltd has entered into a research and laboratory testing agreement with the CSIR to support the revision of the South African Pavement Design Method (SAPDM). The research includes characterising a bitumen-rubber ... Read more
A case study of intelligent compaction used in road upgrades

Author: Leyland, R Date: Aug 2014 Compaction is one of the more important processes in roadway construction. It is needed to achieve high quality and uniformity of materials and ensure design performance. Current procedures using conventional compaction machines and limited ... Read more
The CSIR contribution to the Revision of the SA Road Pavement Design Method (SAPDM)

Author: Maina, J Date: Oct 2012 In this presentation the author outlines the CSIR contribution to the Revision of South African Pavement Design Method. Read more
Evaluation of selected effects of pavement riding quality on logistics costs in South Africa

Author: Steyn, WJvdM ; Bean, W ; King, D ; Komba, Julius J Date: Dec 2011 The efficient operation of a country’s economy depends, among other things, on an efficient logistical system to ensure that goods can be transported efficiently between producers and users. The costs of logistics include aspects such as ... Read more
Heavy vehicle simulator (HVS) evaluation of load transfer efficiency and continuously reinforced concrete inlays on the N3 near Pietermartizburg

Author: Du Plessis, L ; Strauss, PJ ; Perrie, BD ; Rossmann, D Date: Jul 2006 The paper addresses two different heavy Vehicle Simulator (HVS) studies conducted on concrete: Load transfer through aggregate interlock and the use of dowels and the evaluation of the performance of an in-service continuously reinforced ... Read more
Heavy Vehicle Simulator aided evaluation of overlays on pavements with active cracks

Author: Viljoen, AW ; Freeme, CR ; Servas, VP ; Rust, FC Date: Jul 1987 Conventional overlay life estimates are often invalidated by the reflection of existing cracks in a pavement through an overlay. This is attributable to a lack of understanding of the factors influencing relative crack movements and their ... Read more
Laser-based approach for determining flakiness index of aggregates used in pavements

Author: Anochie-Boateng, Joseph ; Komba, Julius J ; O'Connell, Johannes S Date: Jul 2011 There are concerns about the standard methods/procedures for quantifying shape properties of rock aggregates used in road and airfield pavements. The CSIR has recently acquired a portable three-dimensional (3D) laser scanning device to address ... Read more
Method to determine full work of fracture from disk shaped compact tension tests on hot-mix asphalt

Author: Denneman, E Date: Aug 2010 Fatigue cracking is an important mode of failure in hot-mix asphalt (HMA). As part of the revision of the South African pavement design method (SAPDM) a need was identified to assess the fracture toughness of HMA in terms of fracture energy. ... Read more
Rehabilitation design of flexible pavements in South Africa.

Author: De Beer, Morris ; Van der Merwe, CJ ; Rohde, GT Date: 1997 This report contains a set of practical course notes on the Rehabilitation Design of flexible pavements in southern Africa based on extensive research by various researchers and / or practitioners in South Africa. The course is intended for ... Read more c b
Resilient behavior characterization of geomaterials for pavement design

Author: Anochie-Boateng, Joseph ; Tutumluer, E ; Apeagyei, A ; Ochieng, G Date: Aug 2010 Resilient modulus (MR) test and the California Bearing Ratio (CBR) test have been the two most common tests for laboratory characterization of geomaterials, i.e., fine-grained subgrade soils and unbound aggregate materials for road and airfield ... Read more
Road Materials and Pavement Design, Volume 19, Issue 6

Author: De Beer, Morris Date: Sep 2018 Morris de Beer is an associate editor for the journal Road Materials and Pavement Design Read more
Selection of pavement foundation geomaterials for the construction of a new runway

Author: Anochie-Boateng, Joseph Date: Jul 2011 The selection of foundation geomaterials including base/subbase unbound granular aggregate is critical for the design of flexible airfield pavements in the United States. These materials must meet the Federal Aviation Administration (FAA) ... Read more
Short course on: Rehabilitation design of flexible pavements in South Africa

Author: De Beer, Morris ; van der Merwe, CJ ; Rohde, GT Date: Sep 1997 This report contains a set of practical course notes on the Rehabilitation Design of flexible pavements in southern Africa based on extensive research by various researchers and / or practitioners in South Africa. The course is intended for ... Read more
Three-dimensional laser scanning technique to quantify aggregate and ballast shape properties

Author: Anochie-Boateng, Joseph ; Komba, Julius J ; Mvelase, Gculisile M Date: Jun 2013 There is a need to improve the measurements of shape characteristics of aggregates and ballast materials used in the construction of road, airfield, and railway track infrastructures. The fundamental shape properties of aggregate and ballast, ... Read more
Use and interpretation of the dynamic cone penetrometer (DCP) test

Author: Paige-Green, P ; Du Plessis, L Date: Sep 2009 During the early 1930's the California Bearing Ratio test (CBR) was developed for the testing of material strength in the laboratory for the design of pavements. The test involves the compaction of a potential road-building material into a ... Read more

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